/*
 * Copyright 2015-2022 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.hasor.dataql.sqlproc.repository.rule;
import net.hasor.cobble.StringUtils;
import net.hasor.dataql.Hints;
import net.hasor.dataql.sqlproc.dialect.BoundSqlBuilder;
import net.hasor.dataql.sqlproc.repository.DynamicContext;
import net.hasor.dataql.sqlproc.repository.DynamicSql;

import java.sql.SQLException;
import java.util.Map;

/**
 * 效果和使用 `<include refid="sqlid"/>` 标签相同
 * @author 赵永春 (zyc@hasor.net)
 * @version : 2021-06-05
 */
public class IncludeRule implements SqlBuildRule {
    public static final SqlBuildRule INSTANCE = new IncludeRule();

    @Override
    public void executeRule(Hints hints, Map<String, Object> data, DynamicContext context, BoundSqlBuilder sqlBuilder, String activeExpr, String ruleValue) throws SQLException {
        ruleValue = ruleValue.trim();
        DynamicSql includeSql = context.findDynamic(ruleValue);
        if (includeSql == null) {
            throw new SQLException("include sql '" + ruleValue + "' not found.");
        }

        BoundSqlBuilder includeBuilder = new BoundSqlBuilder();
        includeSql.buildQuery(hints, data, context, includeBuilder);

        if (StringUtils.isBlank(includeBuilder.getSqlString())) {
            return;
        }

        if (!sqlBuilder.lastSpaceCharacter()) {
            sqlBuilder.appendSql(" ");
        }

        sqlBuilder.appendBuilder(includeBuilder);

        if (!includeBuilder.lastSpaceCharacter()) {
            sqlBuilder.appendSql(" ");
        }
    }

    @Override
    public String toString() {
        return "include [" + this.hashCode() + "]";
    }
}
